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| 1 | +import CoreGraphics |
| 2 | +import Foundation |
| 3 | +import ImageIO |
| 4 | +import Testing |
| 5 | +import UniformTypeIdentifiers |
| 6 | +@testable import OpenClawKit |
| 7 | + |
| 8 | +struct ChatImageProcessorTests { |
| 9 | + private func syntheticJPEG(width: Int, height: Int) throws -> Data { |
| 10 | + guard |
| 11 | + let context = CGContext( |
| 12 | + data: nil, |
| 13 | + width: width, |
| 14 | + height: height, |
| 15 | + bitsPerComponent: 8, |
| 16 | + bytesPerRow: width * 4, |
| 17 | + space: CGColorSpaceCreateDeviceRGB(), |
| 18 | + bitmapInfo: CGImageAlphaInfo.premultipliedLast.rawValue) |
| 19 | + else { |
| 20 | + throw NSError(domain: "ChatImageProcessorTests", code: 1) |
| 21 | + } |
| 22 | + |
| 23 | + context.setFillColor(CGColor(red: 0.8, green: 0.2, blue: 0.4, alpha: 1)) |
| 24 | + context.fill(CGRect(x: 0, y: 0, width: width, height: height)) |
| 25 | + context.setFillColor(CGColor(red: 0.1, green: 0.7, blue: 0.3, alpha: 1)) |
| 26 | + context.fill(CGRect(x: 0, y: 0, width: width / 2, height: height / 2)) |
| 27 | + |
| 28 | + guard let image = context.makeImage() else { |
| 29 | + throw NSError(domain: "ChatImageProcessorTests", code: 2) |
| 30 | + } |
| 31 | + |
| 32 | + let data = NSMutableData() |
| 33 | + guard let destination = CGImageDestinationCreateWithData(data, UTType.jpeg.identifier as CFString, 1, nil) |
| 34 | + else { |
| 35 | + throw NSError(domain: "ChatImageProcessorTests", code: 3) |
| 36 | + } |
| 37 | + |
| 38 | + let properties: [CFString: Any] = [ |
| 39 | + kCGImageDestinationLossyCompressionQuality: 0.95, |
| 40 | + kCGImagePropertyExifDictionary: [ |
| 41 | + kCGImagePropertyExifDateTimeOriginal: "2026:04:20 16:30:00", |
| 42 | + kCGImagePropertyExifLensModel: "Leaky Lens 50mm f/1.4", |
| 43 | + ] as CFDictionary, |
| 44 | + kCGImagePropertyGPSDictionary: [ |
| 45 | + kCGImagePropertyGPSLatitude: 60.02, |
| 46 | + kCGImagePropertyGPSLatitudeRef: "N", |
| 47 | + kCGImagePropertyGPSLongitude: 10.95, |
| 48 | + kCGImagePropertyGPSLongitudeRef: "E", |
| 49 | + ] as CFDictionary, |
| 50 | + kCGImagePropertyTIFFDictionary: [ |
| 51 | + kCGImagePropertyTIFFMake: "LeakCorp", |
| 52 | + kCGImagePropertyTIFFModel: "Privacy-Leaker-1", |
| 53 | + ] as CFDictionary, |
| 54 | + ] |
| 55 | + CGImageDestinationAddImage(destination, image, properties as CFDictionary) |
| 56 | + guard CGImageDestinationFinalize(destination) else { |
| 57 | + throw NSError(domain: "ChatImageProcessorTests", code: 4) |
| 58 | + } |
| 59 | + return data as Data |
| 60 | + } |
| 61 | + |
| 62 | + private func syntheticPNGWithAlpha(width: Int, height: Int) throws -> Data { |
| 63 | + guard |
| 64 | + let context = CGContext( |
| 65 | + data: nil, |
| 66 | + width: width, |
| 67 | + height: height, |
| 68 | + bitsPerComponent: 8, |
| 69 | + bytesPerRow: width * 4, |
| 70 | + space: CGColorSpaceCreateDeviceRGB(), |
| 71 | + bitmapInfo: CGImageAlphaInfo.premultipliedLast.rawValue) |
| 72 | + else { |
| 73 | + throw NSError(domain: "ChatImageProcessorTests", code: 5) |
| 74 | + } |
| 75 | + |
| 76 | + context.clear(CGRect(x: 0, y: 0, width: width, height: height)) |
| 77 | + context.setFillColor(CGColor(red: 1, green: 0, blue: 0, alpha: 1)) |
| 78 | + context.fill(CGRect(x: width / 4, y: height / 4, width: width / 2, height: height / 2)) |
| 79 | + |
| 80 | + guard let image = context.makeImage() else { |
| 81 | + throw NSError(domain: "ChatImageProcessorTests", code: 6) |
| 82 | + } |
| 83 | + |
| 84 | + let data = NSMutableData() |
| 85 | + guard let destination = CGImageDestinationCreateWithData(data, UTType.png.identifier as CFString, 1, nil) |
| 86 | + else { |
| 87 | + throw NSError(domain: "ChatImageProcessorTests", code: 7) |
| 88 | + } |
| 89 | + CGImageDestinationAddImage(destination, image, nil) |
| 90 | + guard CGImageDestinationFinalize(destination) else { |
| 91 | + throw NSError(domain: "ChatImageProcessorTests", code: 8) |
| 92 | + } |
| 93 | + return data as Data |
| 94 | + } |
| 95 | + |
| 96 | + private func properties(for data: Data) -> [CFString: Any] { |
| 97 | + guard |
| 98 | + let source = CGImageSourceCreateWithData(data as CFData, nil), |
| 99 | + let properties = CGImageSourceCopyPropertiesAtIndex(source, 0, nil) as? [CFString: Any] |
| 100 | + else { |
| 101 | + return [:] |
| 102 | + } |
| 103 | + return properties |
| 104 | + } |
| 105 | + |
| 106 | + private func dimensions(for data: Data) -> (width: Int, height: Int)? { |
| 107 | + let properties = self.properties(for: data) |
| 108 | + guard |
| 109 | + let width = properties[kCGImagePropertyPixelWidth] as? NSNumber, |
| 110 | + let height = properties[kCGImagePropertyPixelHeight] as? NSNumber |
| 111 | + else { |
| 112 | + return nil |
| 113 | + } |
| 114 | + return (width.intValue, height.intValue) |
| 115 | + } |
| 116 | + |
| 117 | + @Test func `resizes landscape long edge to upload limit`() throws { |
| 118 | + let source = try self.syntheticJPEG(width: 4000, height: 3000) |
| 119 | + let output = try ChatImageProcessor.processForUpload(data: source) |
| 120 | + let dimensions = try #require(self.dimensions(for: output)) |
| 121 | + |
| 122 | + #expect(max(dimensions.width, dimensions.height) <= ChatImageProcessor.maxLongEdgePx) |
| 123 | + #expect(abs((Double(dimensions.width) / Double(dimensions.height)) - (4000.0 / 3000.0)) <= 0.02) |
| 124 | + } |
| 125 | + |
| 126 | + @Test func `resizes portrait long edge to upload limit`() throws { |
| 127 | + let source = try self.syntheticJPEG(width: 3000, height: 4000) |
| 128 | + let output = try ChatImageProcessor.processForUpload(data: source) |
| 129 | + let dimensions = try #require(self.dimensions(for: output)) |
| 130 | + |
| 131 | + #expect(max(dimensions.width, dimensions.height) <= ChatImageProcessor.maxLongEdgePx) |
| 132 | + #expect(abs((Double(dimensions.width) / Double(dimensions.height)) - (3000.0 / 4000.0)) <= 0.02) |
| 133 | + } |
| 134 | + |
| 135 | + @Test func `resizes narrow tall long edge to upload limit`() throws { |
| 136 | + let source = try self.syntheticJPEG(width: 1080, height: 2400) |
| 137 | + let output = try ChatImageProcessor.processForUpload(data: source) |
| 138 | + let dimensions = try #require(self.dimensions(for: output)) |
| 139 | + |
| 140 | + #expect(max(dimensions.width, dimensions.height) <= ChatImageProcessor.maxLongEdgePx) |
| 141 | + #expect(abs((Double(dimensions.width) / Double(dimensions.height)) - (1080.0 / 2400.0)) <= 0.02) |
| 142 | + } |
| 143 | + |
| 144 | + @Test func `small image is not upscaled`() throws { |
| 145 | + let source = try self.syntheticJPEG(width: 400, height: 300) |
| 146 | + let output = try ChatImageProcessor.processForUpload(data: source) |
| 147 | + let dimensions = try #require(self.dimensions(for: output)) |
| 148 | + |
| 149 | + #expect(max(dimensions.width, dimensions.height) <= 400) |
| 150 | + } |
| 151 | + |
| 152 | + @Test func `output fits payload budget`() throws { |
| 153 | + let source = try self.syntheticJPEG(width: 4000, height: 3000) |
| 154 | + let output = try ChatImageProcessor.processForUpload(data: source) |
| 155 | + |
| 156 | + #expect(output.count <= ChatImageProcessor.maxPayloadBytes) |
| 157 | + } |
| 158 | + |
| 159 | + @Test func `rejects non image data`() { |
| 160 | + let garbage = Data("not an image".utf8) |
| 161 | + |
| 162 | + #expect(throws: ChatImageProcessor.ProcessError.self) { |
| 163 | + _ = try ChatImageProcessor.processForUpload(data: garbage) |
| 164 | + } |
| 165 | + } |
| 166 | + |
| 167 | + @Test func `strips source metadata from output`() throws { |
| 168 | + let source = try self.syntheticJPEG(width: 3000, height: 2000) |
| 169 | + let output = try ChatImageProcessor.processForUpload(data: source) |
| 170 | + let properties = self.properties(for: output) |
| 171 | + let gps = properties[kCGImagePropertyGPSDictionary] as? [CFString: Any] ?? [:] |
| 172 | + |
| 173 | + #expect(gps.isEmpty) |
| 174 | + for needle in ["Leaky Lens", "LeakCorp", "Privacy-Leaker", "2026:04:20"] { |
| 175 | + #expect(output.range(of: Data(needle.utf8)) == nil) |
| 176 | + } |
| 177 | + } |
| 178 | + |
| 179 | + @Test func `flattens transparent sources to opaque JPEG`() throws { |
| 180 | + let source = try self.syntheticPNGWithAlpha(width: 800, height: 600) |
| 181 | + let output = try ChatImageProcessor.processForUpload(data: source) |
| 182 | + let imageSource = try #require(CGImageSourceCreateWithData(output as CFData, nil)) |
| 183 | + let image = try #require(CGImageSourceCreateImageAtIndex(imageSource, 0, nil)) |
| 184 | + |
| 185 | + #expect([.none, .noneSkipFirst, .noneSkipLast].contains(image.alphaInfo)) |
| 186 | + } |
| 187 | +} |
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